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73 Magazine (Amateur Radio Today)

73 Magazine (also known as 73 Amateur Radio Today) (OCLC 22239204) was a United States-based amateur radio magazine that was published from 1960 to 2003. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, Wayne Green. The magazine title, 73, means "best regards" in amateur radio lingo. Green, a former editor of CQ Amateur Radio magazine, published the first issue of 73 in October 1960.



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73 Magazine (Amateur Radio Today)
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73 Magazine February 1973 (#149) PC-IC-ID - For FM- RTTY- /M- etc ...... K2OAW 27 The Evolution of Spectrum Management - Radio Club of America Talk ...... W4BW 31 Phased Lock Loop Decoder - For continuous tone systems ...... WB6BIH 36 Toroidal Quadreture Antenna - New wideband antenna ...... W4KAE 40 Active Filter Applications - RTTY ...... W1SNN 45 Frequency Measuring System -II - Design theory and clock ...... K5DUS 49 Repeater Keying Line Control - Squelch tail and time-out ...... WB6BIH 60...
Topics: frequency, output, circuit, mhz, input, power, transistor, voltage, repeater, meter, power supply,...
73 Magazine (Amateur Radio Today)
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73 Magazine September 1990 (#360) Quick and Easy Field-Strength Meter - Home-brewing can be simple! ...... KM4KT 9 75 Meter 1/4-Wave Sloper Array - Confessions of a contester ...... WA3EKL 18 Alinco Service Survey - Alinco may be the best show in town ...... WB6NOA 20 Dummy loads for DC Supplies - Don't risk your rig! ...... VE1GM 22 Mobile Power Source Organizer - Easy 12 volt hookups for your mobile gear ...... AH2AR/8 24 End-Fed Copper Dipole - Why buy when you can build? ...... N8KDD 26...
Topics: radio, amateur, antenna, mhz, frequency, ham, power, amateur radio, feedback card, power supply,...
73 Magazine (Amateur Radio Today)
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73 Magazine September 1993 (#396) Computer Control for Beam Antennas, Part II - Give your station a smart, new twist ...... K4OND 10 The W2EKY "Icky-Stick" Antenna - Hit the roof with an improved ground-plane vertical ...... W2EKY 18 Compressing the W3EDP - Build this unique multiband restricted space antenna ...... G2BZQ 20 Distributed Capacity Twisted Loop - An indoor 40 meter antenna for five bucks ...... WA6QBU 26 Evolution of an Antenna - Build a new version of the classic...
Topics: radio, antenna, amateur, mhz, ham, repeater, frequency, amateur radio, radio today, ham radio,...
73 Magazine (Amateur Radio Today)
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73 Magazine April 1967 (#79) The Super Duper Super - It may not be a super, but it's sure super duper ...... WN1ECCH 6 A Toroidal VFO - An excellent VFO with many interesting mechanical features ...... W4BRS 10 Transceiver CW Filter and Monitor - Improve your transceiver's CW capability ...... WlDCG 14 Dreadful Ham Cliches - Special for April ...... K3SUK 16 The Converter Converter - Stick it between your UHF converter and your low-frequency receiver ...... W1OOP 18 The Ratnick Two'er - It's a...
Topics: khz, antenna, watts, power, ssb, circuit, ham, meter, receiver, amateur, power supply, watts pep,...
73 Magazine (Amateur Radio Today)
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73 Magazine January 1983 (#268) Action Machine for 20 - Are home-brew rigs a lost art? No yet! Here's an SSB transceiver you can build ...... WB5IPM 12 An Alarming Procedure - This false-proof repeater emergency alert won't tie up expensive equipment ...... WA1LCF, K1FNX 24 Trimming the Fat from ATV - Why use 3 MHz when 500 kHz will do? WB6FHD proposes a way ...... WB6FHD 32 The Forgetful Autodialer Puzzle - Even Sherlock couldn't figure out how to make an autodialer that reprograms with no...
Topics: antenna, amateur, frequency, ihe, mhz, magazine, receiver, output, tor, amateur radio, toll free,...
73 Magazine (Amateur Radio Today)
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73 Magazine December 1973 (#159) IC Code Speed Display - Check the FCC's code machine with this one ...... VE1BU 25 2 Meter Linear Amplifier - In case you want to try Moonbounce ...... W4KAE 29 A Simple IC Keyer - Nice 3 IC Keyer ...... K2BLA 37 Precision Waveform Generator - Sine, square and sawtooth waves from one IC ...... VE3GSP 41 Helical Resonators - Rise from the depths of QRM ...... W0PSF/2 49 Sensitive RF Voltmeter - Check out your rig's emotional problems ...... WA6NIL 53 The Greenie...
Topics: frequency, amateur, mhz, voltage, output, meter, repeater, power, circuit, receiver, power supply,...
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73 Magazine November 1980 (#242) VSWR... Automatically! - simplify antenna matching with this tune-up aid ...... WB0GWP 42 Welcome Back, Barry! - the Scottsdale RC's most famous member ...... K7NZA 52 Return to Shangri-la - a visit with 9N1MM ...... W1QMS 58 Direct Conversion lives! - excitingly simple receiver project ...... ZS6UP 64 Hams vs. Hurricane Allen - 73 aids St. Lucia relief efforts ...... N8RK 70 Tune In the Wind - a do-it-yourself hot-wire anemometer ...... VE7DKR 80 Direct...
Topics: mhz, antenna, frequency, power, magazine, amateur, radio, model, meter, amateur radio, power...
73 Magazine (Amateur Radio Today)
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73 Magazine December 1991 (#375) The Simple TX TX - The perfect companion for the SupeRX receiver! ...... WA6IVC 10 Project INSPIRE: A Space Shuttle Experiment - Build a simple receiver to explore the wonders of the 60,000 meter band! ...... KG6EK 22 The QUAG-V - A high performance and wide bandwidth antenna for VHF and UHF ...... WB3AYW 36 Computerized Tuning for Ramsey Receiver Kits - It doesn't have to be expensive ...... N8KDD 42 Not Just Another Island - Weekend DXpedition activates the...
Topics: amateur, radio, mhz, antenna, frequency, ham, repeater, receiver, amateur radio, radio today, power...
73 Magazine (Amateur Radio Today)
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73 Magazine October 1977 (#205) Communicate On 10.25 GHz - with a simple transceiver ...... WA3ETD 26 Home Brew Tilt-Over - the water pipe special ...... W4MEA 30 Minimize Feedline Loss - UHF buffs, front end center! ...... W2STM 32 How About 6 FM? - it's easy with a modified HE-50 ...... W3KBM 34 W.A.S. -Easily! - catching the last few ...... W7FGD 38 Fool the Wire Wizard - a computer would have helped ...... Simmons 42 Ultra Simple Diode Checker - for grab bag specials ...... K4GOK 44 Beat...
Topics: mhz, frequency, antenna, output, power, amateur, kit, meter, radio, circuit, amateur radio, tufts...
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73 Magazine September 1982 (#264) Micro Modem - a RTTY TU designed for computers ...... WA4CKQ 10 F1 for the Hot Water 101 -all the way with FSK! ...... K0JH 20 No-Frills RTTY - $2OO and you're on the air ...... WA4STO 24 Incredibly Simple RTTY - receive it on your TRS-40 ...... WQXI 28 The RTTY/Tri-bander Marriage - enjoy the 100% duty cycle ...... K0ARC 32 Confessions of a Counter Evolutionary - part II ...... WAZFPT 38 Double Trouble 0n 50 MHz - Home-Brew Contest runner-up ...... KL7CLK 58...
Topics: output, antenna, mhz, rtty, amateur, input, frequency, radio, magazine, power, amateur radio, power...
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73 Magazine May 1992 (#380) Poor Ham's Dynamic Component Analyzer - Build your own Circuit detective ...... KA1MDA 8 Log Periodic Dipole Array for 2 Meters - Wideband performance in a small package ...... N2KLK 14 QRP Sidetone Companion - And part-time code practice oscillator ...... KI5AZ 18 The Copperback Beetle - A new type of "bug" ...... KI5AZ 20 Battery Watchdog - Keeps your battery up to snuff ...... WB0TCZ/7 26 Control Your Station by Computer - Hardware and software...
Topics: radio, amateur, antenna, mhz, frequency, repeater, call, khz, ham, amateur radio, call call, radio...
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73 Magazine February 1982 (#257) The Fun-Oscillator - a simple, goof-proof vfo for your QRP transmitter ...... WA0RBR 12 Build this Antennalyzer - you'll need a weekend ...... W1BG 16 Police Freqs for the TR-2400 - a sleepless night for the mod squad ...... N9AKX 26 Those Amazing Bobtails - the current-fed connection ...... W1XU 30 Shoot the Moon! - visual tracking for your EME array ...... W9CGI 34 CQ MARS de IC-2A - work new worlds ...... WD8JLW 46 The Father of FM - the tragic story of Major...
Topics: antenna, mhz, frequency, amateur, radio, signal, receiver, ham, magazine, amateur radio, toll free,...
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73 Magazine January 1993 (#388) The Techno-Whizzy 1, Part II - Build a direct digital synthesis (DDS) transmitter ...... N9JZW 10 Programmable-Frequency Audio Generator - High accuracy with digital control ...... Redman 16 The SP-1 Transceiver - Build the HF "Spider" ...... WA8TXT 24 Twin Crystal Ladder Filters - Upper or lower sideband filters using inexpensive crystals ...... N2DCH 32 Handi-Beacon - Turn your tape recorder into a beacon controller ...... WB9YBM 38 The Down East...
Topics: radio, amateur, mhz, antenna, output, power, frequency, repeater, digital, amateur radio, radio...
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73 Magazine August 1993 (#395) A Decade of Packet - An anthology of 73 packet radio articles from 1983 to 1993 ...... WA1RZW 10 FM Packet Deviation Meter - Put your packet station on the money for 20 bucks ...... N5OWK 22 Julieboard - An easy-to-build DDS synthesizer for the PC printer port ...... VE3JIL 40 Computer Control for Beam Antennas, Part I - Give your station a smart, new twist ...... K4OND 54 PC Pakratt for Windows - Love at first byte ...... N1EWO 28 The STARTEK ATH-15 Portable...
Topics: radio, amateur, packet, mhz, ham, antenna, digital, power, repeater, amateur radio, radio today,...
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73 Magazine April 1979 (#223) A Speedy Spinner Mod - 5,000,000 Hz per minute ...... W2RZJ 40 A Variable Bandpass Active Filter - extremely simple design ...... W3KBM 42 What About an Active Antenna? - here's a look at one ...... W5JJ 44 Help for the Hearing-Impaired - don't miss another phone call ...... W4VRV 56 Try a Bi-Loop Antenna - gets you coming and going ...... W7CJB 58 Simple RTTY IDer - uses five ICs ...... G3MEJ 60 Tales of Speech Processing - including a practical design .........
Topics: amateur, mhz, antenna, radio, power, frequency, kit, arrl, tion, amateur radio, power supply, toll...
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73 Magazine December 1977 (#207) Inside Ten-Tec - QRP innovators ...... K4MDK 34 The History of Ham Radio - part V ...... W9CI 38 Try BCB DX! - when you're tired of twenty ...... WB2BJH 42 Build An Engine Analyzer - use your scope! ...... WA6THG/KH6 46 More Repeater Control Devices - control unit/audio interface ...... W7JSW 50 How Do You Use ICs? - part VIII ...... WA2SUT/NNN0ZVB 56 Finally! A Practical Discriminator! - metering system, that is ...... K4GOK 62 A Kilowatt Alternative - try a...
Topics: mhz, frequency, amateur, kit, circuit, power, radio, output, antenna, meter, power supply, amateur...
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73 Magazine July 1979 (#226) A Visit to Antenna Specialists - Wayne tours the test range ...... W2NSD/1 30 Secrets of Guyed Towers - put 'em up and keep 'em there ...... WB3BQO 34 Death-Defying PL Mod for the KDK 2015 - not for the squeamish ...... W8GQL 40 Feed-Horn Mounting Made Easy - solution to a pesky problem ...... WB8DQT 44 Antenna Tuning Joy Revisited - remember the Tektronix 190B? ...... W9CGI 48 Modern Solid-State Equipment Design: A Better Way - sorry, tube fans ...... W4RNL 52...
Topics: antenna, khz, mhz, amateur, meter, frequency, tower, radio, tion, amateur radio, power supply,...
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73 Magazine May 1994 (#404) HI-PER Audio Filter - This project provides High-PERformance CW filtering ...... KC3ZQ 10 Speech Compression - Make a monster mike! ...... KB1UM 16 Fast Charger - Recharge NiCd and NiMH batteries in as little as 30 minutes ...... KN6PK 22 The Radar Gun Reality - Ham scientist testifies on electromagnetic radiation ...... K6UI 30 Improved QRP Keying Circuit - A slick fix for your little CW rig ...... KD1JV 58 The ICOM IC-2iA Micro HT - Meet the evershrinking HT .........
Topics: radio, mhz, amateur, antenna, power, ihe, ham, repeater, tor, amateur radio, radio today, ham...
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73 Magazine December 1981 (#255) Cold Comfort - an HT to the rescue at fifteen below ...... KA1D 12 Review: The Rex Bassett TLM-2 Mobile Mount - banish your fear of flying ...... KAlLR 18 Update Your CW Music Keyboard - play it again Sam ...... K5KL 20 Review: The Kenwood TR-7730 Transceiver - Let's get small ...... KA1LR 26 Joe Ham: The Consumer - do you fit the mold? ...... N6AVU 32 Bob Cooper: Profile of a Pioneer ...... N8RK 38 Satellite Channel Guide - part III ...... WESTSAT 44 Satellite...
Topics: antenna, mhz, amateur, frequency, radio, power, magazine, signal, satellite, amateur radio, power...
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73 Magazine December 1972 (#147) AFSA IV SSTV Analyzer - Also works for RTTY ...... W0LMD 17 Single Conversion 2m FM - No 455 i-f needed - honest! ...... K1CLL 23 Miniature Tone Encoder - Fits inside the mike ...... WA9VGS 29 Tone Burst Decoder - For repeaters and such ...... W3JJU 33 Universal I-F Amplifier - Like for a 2m panoramic receiver ...... DJ1SK 38 Touch-Tone Connections - For repeaters ...... K3DSM 43 Simplest Audio IC Yet - Six parts and a battery! ...... W6YBP 49 Using Varactors -...
Topics: amateur, frequency, mhz, radio, voltage, circuit, repeater, meter, output, tuning, amateur radio,...
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73 Magazine October 1981 (#253) Contesting from VP5 - the other end of the pileup and how to get there ...... WB8BTH 12 In Profile: Ted Gamlin, A Contester ...... KA1D 18 Review: The Kenwood TS-530s HF Transceiver - sophisticated performance at a not-so-sophisticated price ...... KA1LR 26 Folded Unipole for 160 - Top-banders, take notice! Here's a top-loaded radiator with the government's seal of approval ...... WB6ZYK 28 Review: The VIZ WD-747 Digital Multirneter - low cost plus high...
( 1 reviews )
Topics: mhz, contest, magazine, radio, amateur, frequency, antenna, power, ham, amateur radio, power...
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73 Magazine December 1976 (#194) Go Tone for Ten - simple subaudible encoder ...... WB6GON 22 World's Simplest Five-Band Receiver? - using an AM transistor radio ...... K3QKO 28 How Do You Use ICs? - part IV ...... WA2SUT/NNN0ZVB 36 Hamming 101 - another Cabrillo College pioneering program ...... Inman 40 A Super Cheapo CW IDer - for FM repeaters and RTTY ...... K4EEU 46 The ZF Special Antenna - double-D "beam" ...... ZF1MA 51 CT7001 Clockbuster - the ultimate clock / calendar (for...
Topics: mhz, frequency, power, radio, amateur, antenna, output, kit, meter, circuit, amateur radio, power...
73 Magazine (Amateur Radio Today)
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73 Magazine May 1979 (#224) CB to 10 - part XVIII: several PLL rigs ...... K9PS 30 PROM IDer for Longer Callsigns - don't be caught short ...... W4VGZ 34 The W7GAQ Key Collection - 250 museum masterpieces ...... K7NZA 38 Proper FM Transceiver Adjustment - good club project ...... VE3AVY 44 Dual-Band Smokey Detector - Super Scooper does it all ...... W1SNN 48 The DXer's Secret Weapon - costs you nothing ...... W6BKY 64 Foiling The Mad Kerchunker - frustrate him with this circuit .........
Topics: mhz, amateur, radio, kit, frequency, antenna, repeater, power, model, amateur radio, radio club,...
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73 Magazine June 1982 (#261) Build This Digital Vfo - a microprocessor makes it simple ...... WA5VQK 12 Surviving the Unthinkable - part II : some practical ideas ...... AK0Q 30 A Split Personality for the KDK FM2015R ...... K0BV 40 Building for Beginners - happiness is a hot soldering iron ...... N1II 42 Coping with PC Boards - it's not easy to be virtuous ...... KC7M 48 'Lite Receiver IV - the second half ...... WA4CVP, WA4OSR 52 TVRO Transducer - waveguide-to-coax transition ...... WA4CVP,...
Topics: mhz, amateur, radio, antenna, frequency, kit, magazine, receiver, ham, amateur radio, power supply,...
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73 Magazine December 1970 (#123) Solid State Exciters - For the build-don't-buy crowd ...... W6YUY 16 Solid State Control for SSB Exciters - For really smooth tuning ...... W4NVK 28 Hams Are A Funny Bunch of People - Except me and thee ...... K3KMO 31 A 2 Meter Minitransmitter - Hand portable for FM repeaters ...... WB6BIH 32 Receiver Offset Tuning for the HW100 - For tuning in old timers who can't stay on frequency ...... WAZEAW 39 The Little Gate Dipper - 1.7 - 225 MHz GDO with no G .........
Topics: amateur, voltage, frequency, cathode, radio, power, circuit, antenna, output, input, amateur radio,...
73 Magazine (Amateur Radio Today)
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73 Magazine February 1984 (#281) This Antenna Is Too Good To Be True - It's cheap. It works well on all bands. And it radiates a super signal ...... W4HDX 10 Construct the Minuteman Timer - As faithful as a grandfather cock. This timer tells when to ID - and when not to ...... KA8QBQ 14 The Secret of Remote Control - In Inside those miniature planes lie some sophisticated circuits ...... WB3BQO 18 Calculate Your FT-101 - Here 's how to treat your trusty FT-101 to a truly automatic digital...
Topics: amateur, antenna, radio, erm, mhz, frequency, tor, magazine, output, amateur radio, power supply,...
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73 Magazine November 1972 (#146) The Traveling Ham ...... G3ZCZ/W3 5 Solid State Power ...... W6EI 15 TTL SELCAL for RTTY ...... W9ZTK 20 An IC TRF Receiver ...... W6DNS 29 The Mark II Electronic Keyer ...... W6JJI Emergency Power for home QTH ...... WA8OIK 37 High Power Mobile ...... W9NTP 42 220 MHZ Front End Using FETS ...... K1CLL 45 Double Delta Antenna ...... W2EEY 52 FMP Review ...... Staff 57 A Simple Converter for Beginners ...... WA8OIK 59 The Third Hand... Tester ...... WB4MYL 65...
Topics: mhz, output, frequency, amateur, antenna, repeater, power, meter, circuit, input, amateur radio,...
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73 Magazine January 1982 (#256) Egad! A Nine-Tube Linear - results from the W7CSD test bed ...... W7CSD 12 Drama on Mt. McKinley - ice, snow, and amateur radio ...... W7KUF 18 The Simplex Autopatch - a telephone interface for everyone's two-meter rig! ...... WA7VZR 26 The Cheapskate - a checker for bargain diodes ...... K9QLL 30 Constant Current from a Voltage Regulator ...... WA4WDL 39 The Hesitator: A Windshield Wiper Control - a rainy day project ...... N4UH 40 TVRO Signal Source -...
Topics: amateur, mhz, antenna, frequency, radio, output, power, signal, satellite, amateur radio, power...
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73 Magazine October 1991 (#373) The Sudden Receiver - A simple-to-build receiver for 160-20M ...... G3RJV 8 A 10M Sideband Transmitter - Add voice to your QRP station ...... NZ5G 14 Simple Gain Antenna for 903 MHz - Build it for under $25 ...... AD5X 27 Microprocessor Repeater Controller, Part I - Add versatility to your repeater system ...... WB3ESS 28 Low-Pass Antenna Tuner - Match your antenna while reducing harmonics with this unique design ...... KB4ZGC 46 Kenwood's TH-77A Dual-Band Walkie...
Topics: radio, amateur, mhz, antenna, repeater, frequency, ham, amateur radio, radio today, ham radio,...
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73 Magazine June 1994 (#405) MRP4 Solar Panel Control Circuit - Build this easy charge controller for your sun-powered station! ...... WB8VGE 10 Surplus Solar: Is It for You? - An affordable alternate backup power system ...... N7MGT 18 Used Batteries for Ham Stations - Another way to save money on power systems ...... N7MGT 22 All About Those Lightweight HF Ham Whips - Easy mobile operating from 160 to 10 ...... WB6NOA 28 Mobile-ON Alarm Timer - This little circuit could save your car's...
Topics: radio, mhz, amateur, ham, antenna, frequency, battery, amateur radio, radio today, ham radio,...
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73 Magazine November 1982 (#266) A Perfect "10" - Timer, counter, logic probe - 10 functions in all. That's the Multi-Board One and you can build it ...... WA2BHB 10 Remote Control Your IC-701 - Simpler than commercial controllers, this home-brew circuit nevertheless features push-button band changing and frequency selection scanning, and expanded coverage ...... N2GW 14 Automatic Beam Aimer - Here is the scoop on adding set-and-forget convenience to your rotator control. Works with...
Topics: antenna, output, circuit, mhz, voltage, audio, frequency, magazine, power, power supply, amateur...
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73 Magazine April 1987 (#319) Dayton Digest - If you haven't been to the Dayton Hamvention, you haven't been to a hamfest ...... WA4BPI 32 QRP Antenna Farming - Work the world from a small lot with a few Watts ...... W0VM 36 The Cellular Phony Antenna - A two-meter mobile antenna with a twist ...... WA2AJQ 38 Weatherproofed Antennas - Stop ripping apart your antennas every year in the name of "maintenance" ...... KD5UJ 40 Tube Terror - "Before you can leave, you must find an...
Topics: antenna, amateur, radio, mhz, novice, antennas, repeater, frequency, ham, amateur radio, flea...
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73 Magazine April 1964 (#43) Los Angeles Six Meter Repeater ...... K6VWM 6 1296 MHz RF Pre-Amp ...... I1LOV 14 Our Man in Washington ...... W2DUD 18 Under the Noise ...... W2NSD/1 20 The Hallicrafter's SR-160 - a readers look ...... W8GTT 24 An Armstrong Sweeper ...... W2EMF 26 The Man-Key ..... WA60HD 28 IF Spotter ...... W5WGF 34 The Naughty Pi-Net - why is misbehaves ...... K5JKX 38 60 Watts on 75 ...... VE1IC 42 Pushbutton Control ...... K5JIC 48 Waveguide Simplified ...... K5JKX 52 New...
Topics: voltage, receiver, frequency, power, circuit, transmitter, output, antenna, radio, meter, power...
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73 Magazine January 1984 (#280) Breakthrough in Boston: The Birth of Crosslinking - Wl1UKZ built this box. It's small and it works. The question is whether you're ready for it ...... W1UKZ 10 Grenada Log - With a body-bag rig and gas from a bike, a ham hustled home the news. Here's history happening ...... K1XR, N8RK 20 Instant Pane Relief - This is the only notch filter for windows we've ever seen. If you can figure it out, you'll beat the feedline flu ...... KC8UD 22 Sound Off! - Here's the...
Topics: amateur, radio, antenna, mhz, tor, ihe, magazine, por, operator, amateur radio, power supply, radio...
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73 Magazine February 1978 (#209) Inexpensive EKG Encoder ...... WA3AJR 20 What Are They Showing On SSTV? - have you been missing something? ...... K4TWJ 24 Build A Better Phone Patch - hybrid -op amps-the works ...... Poirier 28 Drake TR-4CW Review ...... K4TWJ 30 Build A 3-1/2 Digit DVM ...... WA5VQK/5 40 Clean Up Your Tochtone Act ...... WA6THG 44 The Tempo 2020 -satisfaction tells all ...... WA2KOK 48 Repeater Procedure ...... WB4NAY 52 Tighten Up Your SB-102 ...... W2POG 53 QRP Hints .........
Topics: mhz, frequency, antenna, kit, meter, receiver, khz, power, repeater, amateur, power supply, low...
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73 Magazine August 1988 (#335) What a Mess! - 73's Home-Grown DXpedition ...... W2NSD 10 Auto VIM: Part One - A power supply with some smarts ...... W4RNL 12 Handheld Transformation - Kenwood HT updates you can do yourself ...... N6LRT 19 The Quest for Ultra Portability - How do you get all that stuff to fit on a bike? ...... N4RVE 20 Digicom 64 - Software packet system for the C-64 ...... W2UP 22 Smart "S" Meter - A little help goes a long way in T hunts ...... N6JSX 24 Introduction...
Topics: radio, amateur, mhz, antenna, circuit, frequency, repeater, voltage, ham, amateur radio, power...
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73 Magazine December 1986 (#315) Make The Switch - Add WARC to your rig's bands witch in a few hours—but you'd better get a pair of tweezers ...... WB2JJX 26 A VOX In A Box - This is the SSBer's answer to memory keyers -a tape-loop CQer! ...... K1NYK 34 Split That Audio! - Listen in on one of contesting's best-kept secrets—and add precious points to your next multi-single effort ...... K1NYK 38 Nobody Died - Three courageous amateurs battle the contesting masses on six and two ...... KT2B...
Topics: amateur, radio, antenna, mhz, ham, frequency, antennas, kenwood, hams, amateur radio, power supply,...
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73 Magazine December 1982 (#267) The Hangman's 2-Meter Collinear - Make your tower do double duty. Drop this array from the top and get 6-dB gain ...... W1GV/4 10 Deep-Six Squelch Tails - Kerchunks take a dive with the addition of this audio delay ...... WA2NYE 14 Build Yourself A Paralyzed Beam - Go from east to west In less than a second with this 2-meter array. And put your rotator out to pasture ...... WB2WIK 24 Taming the 2-Meter Linear - It lives In the forest of spurious oscillations and...
Topics: antenna, mhz, frequency, amateur, power, radio, audio, receiver, rtty, magazine, power supply,...
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73 Magazine August 1977 (#203) Dual Rhombic for VHF-UHF ...... W8DMR 24 Microwave Waveguide Details ...... Moak 28 Centerfed Specials ...... K4MDK 30 Recycle Your Receiver ...... W9VZR 32 Build a Double Bazooka ...... K4KI 36 Dirt Cheap Directional Array ...... WA4BKO 40 Instant PS Regulation ...... W3MR 41 Take Cover! ...... WB5ASA 44 Introducing the Intenna ...... Norman 46 The Zeppy Vertical ...... K5GP 47 A Cure for Antenna Self-Destruct ...... W9TKR 48 Quick Ante nna Insulators .........
Topics: antenna, mhz, kit, power, meter, frequency, model, amateur, circuit, wire, power supply, amateur...
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73 Magazine May 1982 (#260) Pacific Odyssey - the Kingman/Palmyra adventure ...... KB7NW 12 Top-Notch for Top Band - super antennas for 160 ...... N3BEK 26 The Fun-Amp - 20 Watts out ...... WA0RBR 32 The CCD Antenna Revisited - does it measure up on 40m? ...... W4ANL 40 Antenna-Raising: The Good-Neighbor Policy - sidestepping civil war ...... AK5Q/4 42 'Lite Receiver IV - part I: building it is a breeze ...... WA40SR, WA4CVP 48 TVRO Sound Decoders - Satellite Central, part VI ...... Gibson 58...
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73 Magazine December 1979 (#231) New Product: Swan's Astro 150 SSB Transceiver ...... WB8BTH 32 Low-Cost Receiver for Satellite TV - this modular design uses readily available technology ...... N6TX 38 A Simple 2m/10m Crossband Repeater System - work the world with an HT! ...... K9EID 44 Audio Booster for Mil-Surplus Receivers - a must for headphone haters ...... McClellan 50 Working with FETs - part II : experiments with gain and supply voltage ...... WA2SUT/NNN0ZVB 54 Build this $50...
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73 Magazine May 1981 (#248) Two-Meter Antennas: Facts and Fables - the truth about omnidirectional antennas on two ...... W1IS 12 The 440-MHz Curtain - hang this broadbanded two-bay collinear on your tower and get 22 dBi to play with ...... WA9OZC 22 The Plumber's Parabolic Mount - a first-class hydraulic system ...... WD4MRJ, KA4JYD 28 The History of Ham Radio - part XIV ...... W9CI 36 The Skeptic's Multiband Ground Plane - This antenna flies in the face of accepted theory. Do you think it...
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73 Magazine January 1994 (#400) Using the World's Most Accurate Frequency Standard, Part 1 - Building a receiver for WWVB ...... K9EUI 10 Micro IDer - An easy-to-build automatic Morse code station identifier ...... KA9SZW, Pointer 18 The "Hula Loop" - A stationary bidirectional hybrid three-element delta loop ...... NH6XK 30 The Quad Charger - A constant current NiCd charger ...... K4GOK 34 EASY-PC Printed Circuit Layout Software - Want to get into computer-aided design (CAD)? .........
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73 Magazine February 2003 (#507) Cheap & Easy Portable HF Vertical - Try this medium-weight, sturdy, neat, visually pleasing, fun to use ...... K8MKB 10 Troubleshooting Computer Power Supplies - Rule # 1: Be careful ...... W6WTU 14 Build This Simple SMT Station - Dinner and a movie? How about pizza and a project? ...... AA2JZ 23 How's That Thing Really Work, Anyway? - Part 1: Receivers ...... AA2JZ 25 Warblemania - and other QRP afflictions ...... NY9D 27 Breakdown in Cape Town - The...
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73 Magazine June 1979 (#225) Add Digital Display for $50 - 100-Hz accuracy ...... K4IQJ 28 High-Performance Receiver Add-Ons - aren't ICs wonderful? ...... W5DA 32 A Solution to the Home-Brew Housing Shortage - building a box for your next project ...... W0IHI 38 How Do You Use ICs? - part XI ...... WA2SUT/NNN0ZVB 42 Customize Your HT144B - some nifty mods ...... W2KGV 46 Ultra-Simple CMOS Logic Probe - a single IC does it all ...... WB9PHM 50 "The Voice of Wolf Creek" - the KGCX...
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73 Magazine June 1972 (#141) Six Elements on Twenty Meters - Eliminate QRM ...... VE3GEJ 17 Slow Scan Television - Basics ...... G5ZT 21 Beaming the Vertical Antenna - On the low bands ...... W6AJE 27 Active Filter Design and Use - All kinds of filters Part I ...... K3PUR 36 Antenna Party - Simplified erection ...... W0BMW 45 Radio Astronomy for Amateurs (Part II ) - Projects for amateurs to tackle ...... W4ZBE 51 Patenting Your Invention - Why not ... why? ...... Hunter 61 20 dB Beams - Design...
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73 Magazine November 1977 (#206) Build The Omni-OSCAR! - practical omnidirectional antenna ...... K2OVS 24 Get Set For OSCAR 8 - details on the new bird! ...... W3HUC 28 Build An OSCAR 2m Transverter - make QRP days a success! ...... W2GN 32 Predicting OSCAR Propagation - not always simple ...... G3IOR 34 Try OSCAR Mobile - the ultimate DX test! ...... W2GN 40 Tic Tac Touchtone - a new mentod! ...... W9CGI 44 Visual OSCAR Finder - nice side effects! ...... WB2BWJ 50 Cheap Ears For OSCAR - an...
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73 Magazine November/December 1975 (#182) Flip Flops Exposed ...... WB2NEL 30 Breakthrough in Fast Scan ATV ...... WB4YTU 37 Strobing Displays is Cool ...... WB4DCV 49 The Sensuous Tuned Lunch Box ...... W2FEZ 52 Loudest Signal in the World? ...... W0SYK 57 Build a Deluxe TTY Keyboard ...... K7YGP/7 63 Eyes for Your Shack ...... W0ACR 74 Predicting Third Order Intermod ...... WA2OKZ 95 Feedline Primer ...... WA1SNG 103 Caught "Spying" by the Gestapo ...... W1BNN 117 Why Tubes Haven't...
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73 Magazine December 1980 (#243) Who Really Invented Radio? - the twisted tale of Nathan B. Stubblefield ...... WB2NEL 36 In Search of the Elusive SES - track solar activity with this simple VLF receiver ...... WA3UER 42 An Even Better IC Timer - better than what? ...... WA0PBQ 46 Direct Printing FAX - Part II: constructing the facsimile recorder ...... WB8DQT 52 A 600-MHz Universal Counter - you'll freq out over this one ...... W4VGZ 58 Top-Banding the DX-60B - Part II: a companion vfo .........
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73 Magazine December 1983 (#279) Code Practice: Have You Seen the Light? - This simple cpo is the best weekend project under the sun -or bulb ...... Davidson 10 Unlimited Guarantee for Power Supplies - Plan for the worst and you'll get the best, says KC0EW. He might be right ...... KC0EW 20 PC Boards in a Flash! - Make circuit boards without expensive equipment. All you need is a light and a fast switch hand ...... KA1FJR 28 "We've Been Boarded!" -When the Lorelei strayed into...
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73 Magazine January 1985 (#292) Eight Mods for the IC-730 - Customize your ICOM! Snip here. solder there, and enjoy perfection ...... N6HI 10 VIC RAMification: Part I - Here's how to turn 3 ICs and half an hour into 24K of extra VIC-20 memory ...... Brefini 18 VIC RAMification: Part II - W6LOB fills the 3K gap of Part I with a quick piggyback RAM expansion ...... W6LOB 22 Transistors: A Biased Approach - In Part II, we evaluate base current and gain and use this information to design a working...
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73 Magazine May 1980 (#236) Home-Brew Rf Impedance Bridge - indispensable tool for antenna fans ...... WB6BIH 30 Rotary Beam for 10 or 15: the LB-2 - eliminates nasty matching problems ...... W6TYH 36 The 20-Meter Double Bobtail ...... W8HXR 44 Simple Switcher - a remote antenna switch with no control wires ...... WB5SFB 48 Taming the Monster Quad - a four-element blockbuster you can build ...... WA4JQS 50 For Cheapskates Only: A No-Frills Tilt-Over - requires a friend with a welding rig .........
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73 Magazine February 1983 (#269) Unleash the TS-900 - A rig like this deserves more room than 2meters can give. Get on HF (including WARC bands) with this transverter ...... W4BF 10 Four-Tone Audio Oscillator: A Potent Troubleshooter - For any test that requires a tone, this oscillator does the job It can also be computer-controlled ...... W7BBX 20 Superman's Repeater Control System - This simple system offers four independent on/off outputs. Just duck into any phone booth to use it ...... K3IJ...
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73 Magazine (Amateur Radio Today)
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73 Magazine September 1989 (#348) Vertical Antennas at HF: Part I - The inside story on vertical antennas ...... W1GV 38 Build a 30 Meter Trap - Modify your Cushcraft AV-4 or AV-5 for this WARC band ...... KE0UV 11 Unique 12 and 17 Meter Dual-Band Beam - Build this for an 8 dBd signal! ...... W6YUY 20 Kaboom Micro Keyer - For safe mobile CW operation ...... KB1UM 28 3/4 Inverted "U" for 160m - Big signal on the Top Band ...... WA3EKL 32 The Hamfester - "Crowdbuster" for your...
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73 Magazine January 1981 (#244) Emergency Tone Alert System ...... WB5UVC, WB5ASA, WB5PRD 42 WWV-to-80 Meter Converter ...... N7BH 48 Cheap and Simple - your basic 13.8-V, 25-A power supply ...... WA9VLK 50 Direct Printing FAX - part III; testing and operation ...... WB8DQT 54 Unplug It, Dummy! - safety for the traveling ham ...... WB9SKX 58 Power Plus for the Omni - Improving on Ten-Tec's power supply ...... WA4IQQ 60 Oddball Offsets for the KDK-2015R - make a good rig better ...... WB6MYF The...
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73 Magazine June 1984 (#285) Easy Berardi Building - You can count on this simple frequency counter from Arizona ...... Berardi 10 Don't Grope in the Dark! - Let a simple card-file box be the brains of your own emergency lighting system ...... W7RXV 16 Flying High with Two - Here's how a hand-held makes for some ultralight Michigan madness ...... WB8DQT 20 Creason's Do-It DVM - The more Sam builds, the more smart people pay attention ...... K6EW 26 Meeting Ends Make - These ten tips will better...
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73 Magazine January 1980 (#232) NBVM: Dawn of an Era or Promotional Hype? - the performance and politics of Narrow Band Voice Modulation ...... N8RK 30 Frequency Counter Survival Course - use that gadget wisely ...... McClellan 36 DX with a Difference: the Utility Stations - when the ham bands get frustrating, give SWLing a try ...... WA3EOP 40 How to Write a RTTY Program - machine language is easier than you think ...... WA4FMZ 46 The Perfect Morse Machine - send and receive CW with a...
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73 Magazine December 1987 (#327) Welcome, Newcomers! - A "read-this-first" for budding hams ...... KA1HY 5 History of the ICOM 2AT - The world 's most popular handheld ...... KT2B 18 ICOM BP-4 Charging Adapter - Our technical editor beats the system ...... WB9RRT 20 Yaesu FT-209 Modifications - Expanding your HT's horizon ...... KD2WA 26 Buyer's Guide to Handhelds - A little help from your friends at 73 ...... NA5E 28 History of Hand-Held Communications - Their place in western...
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73 Magazine November 1985 (#302) "Just Leave Me Here To Die!" - In June, 1985, two VHF contesters trudged 4200 feet to the top of Slide Mountain. Fifty-pound packs, wet weather, and pernicious porcupines were simply a part of the fun ...... KT2B 14 Toss Out Your Tubes! - Replace them with high-performance FETs. OA4KO shows you how ...... OA4KO/YV5 Improve Your Audio Report - Are you tired of lying to your fellow amateur? Try the QRI signal reporting system. Let him know what he really...
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73 Magazine December 1998 (#459) Probing Auto Electronics - Help your neighbor identify his car's problem and be an electronic's hero! ...... W6WTU 10 Announcing the QRPeanut - Here's a compact QRP transmatch you can build for next to nothing ...... N5GZH 14 Keys to Better Operating - Yes, much of it is common sense ...... W6BNB 17 Electronic Bug Emulator - Put some personality back into your CW ...... W4LJD 27 Low-Voltage Detector - for a number of uses ...... W6WTU 31 George's XE-Ient...
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73 Magazine October 1969 (#109) A Super-Gain Antenna for 40 Meters - Nine db on 40 meters might be called "super" ...... W4NVK 8 DX Corner - WTW reports and other DX jazz ...... K2AGZ 12 FET Chirper - Signal source for peaking converters for optimum signal/noise ...... K6QKL 20 The Inside Info on Alexander Graham - Or how the telephone really works ...... W2FEZ 24 Leaky Lines - Similar to "Grumbles," but by a licensed amateur, not a CB'er ...... K2AGZ 28 Scope Calibrator -...
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73 Magazine June 1992 (#381) 8,000 Channels for the Ramsey FX-146 - Add direct frequency input to this popular 2 meter transceiver ...... KG7BK 10 VE3CYC's Wire Beam - Versatile gain antenna for a limited space ...... VE3CYC 16 Touch-Tone Squelch - Remote speaker control with a DTMF decoder ...... VE3RGW 20 Build Your Own 20 Meter Transceiver - Work the world with this easy-to-build rig ...... WB6NKJ 26 The j-Com Ventriloquist - Throw your voice with the push of a button ...... WB8ELK 40 The...
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73 Magazine October 1995 (#421) The QRP Delight - A full-featured antenna tuner with built-in SWR meter ...... AD5X 10 DDS Dream VFO - Yes, you can build your own synthesizer! ...... KD1JV 14 Portable Solar Electric Power Generator - The sun is free for the using ...... K4SYU 20 Armstrong Updated - A high-performance, regenerative short-wave receiver ...... KC3ZQ 26 Link it All! - Why settle for operation on just two bands? ...... WB9YBM 32 Boring Beacons! - Making additional use of beacon...
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73 Magazine April 1992 (#379) The Arrow Antenna - Hit the bull's-eye with this portable VHF sharp shooter ...... KA0VFF/N0IMW 10 The Plumber's Delight - A new look for the J-pole! ...... KB6EPO 16 The Flower Pot Special - Plant your antenna! ...... N1GPH 18 The Rock Bender QRP Transmitter - Win QSOs and influence crystals ...... WI5W 22 Monoband Yagi for 20 Meters - More dBs for the buck ...... AB4GX 30 The SAM1 Transverter - For the challenge of LF/VLF ...... WD4PLI 36 Heil HM-10 Dual and...
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73 Magazine November 1983 (#278) Construct the Callsign Power Supply - KAIQZ put together aesthetics and electronics to produce a power supply that gives you more than good regulation ...... KA1QZ 10 The Magical Audio Filter - A variable frequency notch filter plus a peaking circuit will do wonders for your reception. And this project will almost build itself ...... W6QIF 14 Keyboard Your Way to Happiness - If happiness is perfect Morse, then this project is pure heaven. Special construction...
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73 Magazine April 1982 (#259) Watching the Weather - a cheap and easy conversion ...... KA9GDL 10 The Sinkhole That Ate Winter Park - hams vs. hole ...... KA4RUL 18 Operation Skywarn - tracking tornadoes with two meters ...... WB5ZAM 24 Measure Ohms with Your Calculator? - yes, and accurately, too! ...... Johnson 28 Scanning with the IC-280 ...... N7AAD 36 Detect Killer Tornadoes - use an ordinary TV set ...... K2VJ 50 TVRO Dish Selection Tactics - Satellite Central, part V ...... Gibson 54...
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73 Magazine July 1982 (#262) Log of the Colorado Queen - wet, wild Field Day fun ...... K3PUR 12 CB to CW? - converting the Hy-Gain board ...... W1BG 18 Hands Across the Water - CW lives on historic Cape Cod ...... KAID 38 A Three-Piece CP - battery not included ...... WB5WAF 46 Coherent CW for VHF - will it work? ...... W3QVC, VE3DPB 48 Electric Health via Negative Ions - combating an invisible menace ...... WB0GX 52 The Very, Very Best CW Filter? - costs under ten bucks ...... WB4TYL, AG5G 56...
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73 Magazine May 1986 (#308) Lousy Inconsiderate Dummies - Lids we love to hate ...... W2NSD/1 28 Speed-Charge Your PB-21 - Is your TH-21 spending more time on your desk than on your belt? ...... WA8IZV 32 Army Surplus CW - Revamp the CIA's secret CW sender ...... W8MFL, WL7AKZ 36 The Day the Aliens Landed in Limerick, Maine - The ultimate eyeball QSO ...... W1ROM 38 The Hula Hoop Loop Revisited - A new twist in deep-null receiving antennas ...... W6QIF 42 Are Sine Waves Sacred? - Plug your...
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June 1978 (#213) Happiness Is Being A Ham Manufacturer - 73 visits Cushcraft ...... W2NSD/l 30 Extended Double Zepp - old-timer's delight still works ...... W6TYH 34 New Dipole Feeder - tuned feeders, yet! ...... AA6AX 38 The Cliff-Dweller's Delight - how to operate from an apartment ...... WA2UVC 40 Wait Till You Try 16 Elements! - 15dB gain on 2m is a real kick ...... WA8FCA 42 Working 15m With A 20m Beam - by adding three more elements ...... W8ZCQ 46 A Better Feedthrough For Cables - the $2...
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73 Magazine (Amateur Radio Today)
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73 Magazine October 1984 (#289) Find Fault with Your Coax - Is your cable really doing its job? Find out with this elegant detective method ...... K4IPV 10 The Aussie Parasol Beam - What has twelve corners, three bands, and uses 140 feet of wire? Hint: It's not a quad ...... W6TYH 20 The Incredible Broadband Bowtie - Truly designed for solid-state finals, this 75m antenna features 50 Ohms at the feed-and less than 1.5:l swr across the band ...... KC3HW 26 RX for Ailing Antennas - Maximize your...
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73 Magazine (Amateur Radio Today)
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73 Magazine November 1984 (#290) Color Computer SSTV: Part I - Turn your CoCo into a complete SSTV terminal How? First, build this high resolution display system ...... K6AEP, WB8DQT 10 Wrap Up TVI! - Can you endure another evening without transmitting? Use this simple cure to choke out television interference forever ...... KR7L 26 But I Know How To Solder! - Anyone can dribble hot metal over a joint, bit it takes an artist to really solder. Are you a Picasso or a pig? ...... WD4S 28 Free-Form...
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73 Magazine December 1992 (#387) The Techno-Whizzy 1, Part I - Build a direct digital synthesis (DDS) radio ...... N9JZW 8 The Key to Unlocking the HTX-100 - Improved RIT control ...... AC3L 20 Is 2 Meters Hazardous to Your Health? - How to calculate safety ...... N1II 28 Build a LiTZ Decoder - Touch-tone control your speaker for emergency alerts ...... KA5RZI, N7IOB 30 Iambic Keyer Paddles - A wide array of choices ...... N6HI 36 The Beach Brawley Boomer - QSOs made in the shade ...... NH6XK...
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73 Magazine May 1985 (#296) Discover the Discone - Is this the perfect aerial? Consider simple wire constrcution, easy one-time tuning, and flat swr from 3.5 to 28 MHz ...... W1GV/4 17 Two for Two - We respectfully offer a pair of radiators for the two-meter band so elegant, yet so simple, that you will kick yourself for not thinking of them first ...... WA4BLC 22 The Snake with LED Eyes - A tall tale from the Antlers- wherethe decoration is strange and the stories are even stranger .........
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73 Magazine (Amateur Radio Today)
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73 Magazine (Holiday Issue 1976) (#195) Build This Inexpensive 400 Watt Amplifier - a pair of shoes never hurts W7SCD How Do You Use ICs? - part V WA2SUT/ NNN0ZVB Mobile Smokey Detector - 10.5 GHz:use it or lose it W1SNN Get a Kid Off the Streets - and in to ham radio WA1GFJ Add RIT to Your Transceiver - a must for CW operators Staff Coronaries for Burglars - with this cheapo car alarm WB60DS Power Supply - versatile WB4EHG DXpedition : Memories for a Lifetime - reflections of HKITL K3JJZ...
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73 Magazine April 1977 (#199) Shoot the Moon! ...... K3BPP 44 Frustrating The Thieves ...... WB0GGT 46 Automatic Autopatch Release ...... WA1RTD 52 Emergency 911 System ...... WA2RXQ 54 The Downspout Vertical ...... K8ANG 55 RTTY? What's That? ...... WA6CPP/WA7PEI 56 Do-It-Yourself Photosensitizing ...... KL7AE 57 Making Your Own PC Boards -Part II ...... Smith 58 Curing Mobile Noise Miseries ...... G3BID 64 An Intelligent RTTY Station ...... K7YZZ 72 Interrupts Explained! ...... ZL1TRM 76 CW...
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